void main(void) {
TRISBbits.RB0 = 1; // KEY1 is input
TRISBbits.RB1 = 1; // KEY2 is input
SSEG_Init(); // Initialize SSEGs
// Configure Timer0
OpenTimer0(TIMER_INT_ON & // Enable TIMER Interrupt
T0_16BIT & // Timer0 is configured as an 16-bit timer/counter
T0_SOURCE_INT & // Internal instruction cycle clock (CLKO) acts as source of clock
T0_PS_1_16); // 1:16 Prescaler value
WriteTimer0(TMR0_value); // Write Timer0 value to Timer0 to count
INTCONbits.INT0E = 1; // Enable Interrupt 0 (RB0 as interrupt)
INTCON2bits.INTEDG0 = 1; // Interrupt 0 occurs at rising edge
INTCONbits.INT0F = 0; // Clear Interrupt 0 flag
INTCON3bits.INT1E = 1; // Enable Interrupt 1 (RB1 as interrupt)
INTCON2bits.INTEDG1 = 1; // Interrupt 1 occurs at rising edge
INTCON3bits.INT1F = 0; // Clear Interrupt 0 flag
INTCONbits.GIE = 1; // Enables all unmasked interrupts
while(1) {
Delayms(250);
if(direction_flag == 0) {
counter++; // Increase counter by one
if(counter > 99) counter = 0;
}
else if (direction_flag == 1) {
counter--;
if(counter < 0) counter = 99;
}
}
}
int main(void) {
unsigned int counter = 0;
TRISBbits.RB0 = 1; // B0 is set as input(KEY1)
TRISBbits.RB1 = 1; // B1 is set as input(KEY2)
SSEG_Init(); // sseg pins are set as output
while(1) {
if (PORTBbits.RB0 == 0) { // if B0 is 0 (KEY1 is pressed)
while(PORTBbits.RB0 == 0);
counter--;
SSEG_Print(1,counter%16); // between 0 and F
}
if (PORTBbits.RB1 == 0) { // if B1 is 0 (KEY2 is pressed)
while(PORTBbits.RB1 == 0);
counter++;
SSEG_Print(1,counter%16); // between 0 and F
}
}
}
int main(void) {
TRIS_KEY1 = 1;
TRIS_KEY2 = 1;
TRIS_LED1 = 0;
TRIS_LED2 = 0;
LAT_LED1 = 0;
LAT_LED2 = 0;
/* External Interrupts Configuration */
INTCONbits.INT0E = 1; /* Enable Interrupt 0 (RB0 as interrupt) */
INTCON2bits.INTEDG0 = 1; /* Cause Interrupt 0 at rising edge */
INTCONbits.INT0F = 0; /* Clear Interrupt 0 flag */
INTCON3bits.INT1E = 1; /* Enable Interrupt 1 (RB1 as interrupt) */
INTCON2bits.INTEDG1 = 1; /* Cause Interrupt 1 at rising edge */
INTCON3bits.INT1F = 0; /* Clear Interrupt 0 flag */
ei(); /* Global Interrupt Enable */
/* Initialize LCD 16 cols x 2 rows */
HD44780_Init(16, 2);
HD44780_Puts(3, 0, "PIC18F4520");
HD44780_Puts(0, 1, "16x2 HD44780 LCD");
Delayms(2000);
SSEG_Init();
KEYPAD_Init();
OpenADC(ADC_FOSC_4 &
ADC_RIGHT_JUST &
ADC_0_TAD,
ADC_CH0 &
ADC_REF_VDD_VSS &
ADC_INT_OFF,
ADC_1ANA);
Delay(50);
/* Loop forever */
while(1) {
if (state == STATE_LCD) {
counter = 0;
lcd_flag = 0;
while(lcd_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "1.LCD TEST");
HD44780_Puts(0, 1, "<<ADC LED>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "1.LCD TEST");
HD44780_Puts(0, 1, "<<ADC LED>>");
while(lcd_flag == 0){
HD44780_Clear();
HD44780_Puts(0, 0, "PRESS KEY1 FOR");
HD44780_Puts(0, 1, "LEFT");
Delayms(500);
HD44780_Clear();
HD44780_Puts(0, 0, "PRESS KEY2 FOR");
HD44780_Puts(0, 1, "RIGHT");
Delayms(500);
counter++;
if(counter > 3) {counter = 0; break;}
}
}
else if (state == STATE_LED) {
counter = 0;
led_flag = 0;
while(led_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "2.LED TEST");
HD44780_Puts(0, 1, "<<LCD SSEG>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "2.LED TEST");
HD44780_Puts(0, 1, "<<LCD SSEG>>");
while(led_flag == 0) {
LAT_LED1 = 1;
LAT_LED2 = 0;
Delayms(50);
LAT_LED1 = 0;
LAT_LED2 = 1;
Delayms(50);
}
LAT_LED2 = 0;
}
else if (state == STATE_SSEG) {
counter = 0;
sseg_flag = 0;
while(sseg_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "3.SSEG TEST");
HD44780_Puts(0, 1, "<<LED KEYPAD>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "3.SSEG TEST");
HD44780_Puts(0, 1, "<<LED KEYPAD>>");
while(sseg_flag == 0) {
SSEG_Print(1,sseg_counter%10);
Delayms(10);
SSEG_Print(2,sseg_counter/10);
Delayms(10);
sseg_counter++;
if(sseg_counter > 99) sseg_counter = 0;
}
LATCbits.LATC0 = 0;
LATCbits.LATC5 = 0;
}
else if (state == STATE_KEYPAD) {
counter = 0;
keypad_flag = 0;
while(keypad_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "4.KEYPAD TEST");
HD44780_Puts(0, 1, "<<SSEG ADC>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "4.KEYPAD TEST");
HD44780_Puts(0, 1, "<<SSEG ADC>>");
while(keypad_flag == 0) {
int_key = KEYPAD_Read();
char_key = (char)KEYPAD_KeytoASCII(int_key);
HD44780_CursorSet(0,0);
if(int_key != 0xFF)
printf("4.KEYPAD TEST: %c", char_key);
Delayms(50);
}
}
else if (state == STATE_ADC) {
counter = 0;
adc_flag = 0;
while(adc_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "5.ADC TEST");
HD44780_Puts(0, 1, "<<KEYPAD LCD>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "5.ADC TEST");
HD44780_Puts(0, 1, "<<KEYPAD LCD>>");
while(adc_flag == 0){
ConvertADC();
while( BusyADC() );
adcin = 1023 - ReadADC();
dcf_old = dcf;
dcf = (1-lamda)*dcf + lamda*adcin;
if(dcf != dcf_old) {
HD44780_CursorSet(0,0);
printf("5.ADC TEST: %4d", (int)dcf);
}
}
}
else state = STATE_LCD;
}
}
